Please help! have a hair question?

so i use burts bees shampoos & conditioners. Today i used the "very volumizing pomegranate & soy shampoo", then for my conditoner i used "More moisture raspberry & brazil nut Conditioner", When my hair was dryed, it was extremely oily!!! i was really frustrated & had to wash my hair with lots of shampoo just to get the oily out of my hair, How come this happened? other times i have used the "more moisture shampoo& conditioner" Has this happened to anyone before? or can you help me solve why my hair got oily?